Stove



Sept, 2?, 1932. s n- 1,879,954

STOVE Filed March 13, 1931 ARTHUR SMlTH INVENTOR BY I i I, o W T N EY Patented Sept. 27, 1932 ARTHUR SMITi or roar onnsrnn, NEW YORK, assrenon ro s. STERNAU or NEW YORK, n. Y., A. conroaA'rron-or new. YonK STOVE Application filed March 13, 1931. Serial No. 522,189.

This invention relates to stoves, and. more particularly to stoves of the type whichutiljize an alcohol burner.

A salient object of the invention is the provision of a stove which is adapted to burn solid or liquid hydrocarbon fuel, wherein combustion is efficiently consummated and effectively controlled.

Another object of the invention is to provide a burner unit which may be used with a series of interchangeablefuel containers. 7

Another object of the invention is the provision of a stove of this type which is simple, easy tooperate, and is not likely to get out of order.

A further object of the invention is the provision of a stove of this type which can be easily and inexpensively manufactured from readily available materials.

Other objects of the invention will in part be obvious and will in part appear hereinafter.

The invention accordingly comprises the features of construction, combination of ele* ments, and arrangement of parts, which will be exemplified in the construction hereinafter set forth and the scope of the application of which will be indicated in theelaims.

For a fuller understanding of the nature and objects of the invention reference should be had to the following detailed description taken in connection with the accompanying drawing, in which: 7

Fig. 1 is a side elevation of a stove embodying features of the invention, a portion thereof being broken away to show theinterior burner structure, this last being in vertical section. 7

Referring more particularly to the drawing wherein is depicted an illustrative embodiment of the invention, there is shown a stove body generally designated at 10 having an end wall 11, front wall 12, rear wall 13, a top 14 and a bottom wall or plate 15. Top wall 14' is provided with a suitable burner opening, as at 16, over which may be disposed a utensil supporting rack 17. The lower portion of front wall 12 is formed by'a door 18 hinged at its lower end to the stove body, and adapted to open outwardly to permit insera on, me,

tionand removal of a fuel container which will behereinafter more fully described. Hingedly mounted to the stove body at 19 is a burner unit support 20, which is in the form of a. flat. plate having a widened cen- I trally perforate intermediate portion 21, an upstanding portion 22 and terminating in "a horizontally disposed pivot support 23. Fixed to the. intermediate portion of sup port 20 is a generally cylindrical outer shell 24, which is open at its top, and is provided at its lower portion with an inwardly extending annular seat 25, V An inner shell 26 having a closed top portion 27 is telescoped within and rotatable with respect to shell 24. The top portion 27 projects downwardly slightly beyond the vertical wall portion of shell 26 forming an annular lip 28. which rests upon and forms a substantially airtight connection With the upper edge of shell 24. These shells are each provided with air ports 29 and 30, which are adapted to be moved into and out of registry with each other during rotation of shell 26. A single .port or a plurality thereof may be used,two such ports being shown in the embodiment illustrated in the drawing, The. port 29 in the outer shell is provided at one end with a bendable lug 31, which is adapted to be bent inwardly after assembly of the 1 two shells, as illustrated in the drawing, so as to interlock the same against relative vertical movement. Such lug also acts as a stop to limit relative rotation between the shells. It will be seen that shells 24 and 26 mutually f form a unitary housing having an open bottom and having air inlets, which inlets may be constantly open or adjustably closed, as desired.

Pivotally mounted on portion 23 of support 20 is an operating lever 32, having-a knob 33 at its outer end, and having its inner end pivoted at 34 to one end of a link 35, the other end of which is pivoted at 36 to the top of rotatable shell 26. A retaining plate37 39 is disposed over lever 32 and spaced from support 23, to which it is fixed. It will be apparent that oscillation of lever 32 in a horizontal plane will effect rotation of shell 26, and that the lifting of suchilever in a vertical plane seat 25 of the burner housing.

outlet of the injector passage.

operates in a slot 38 extending verticallyin.

front wall 12. This slot is provided near its upper end with a horizontal shoulder 39, on p which the lever portion 32 is adapted to rest when itis desired to retain the burner unit in its uppermost inoperative position. i

There is fixed to the i: ner shell 26 ofj'the" burner unit a generally cylindrical chimney 40, which extends through and closes a circular opening in the top wall 27 of such shell.

The upper portion of this chimney projects above wall 27 toward the burner opening 16. The lower portion of the chimney extends downwardly through the shells 24 and 26, somewhat below the seat25. Such seat ap 'proaches, but is spaced from chimney 40, leaving an annular opening. 41 therebetween. The projecting extreme lower portion of chimney 40 is flared outwardly at 42. One or more suitable notches 43 are preferably providedin the lower edge of chimney 40, for a purpose which will be hereinafter described.

The burner which has been thus far described constitutes a unit which is adapted to be used with a series of interchangeable fuel containers such as 44. Such containers are preferably cans in whichsolidified alcohol is commercially vended, although the present invention is not limited to this specific type of container. The commercial can referred to has an upper rim portion such as 45 which is configured to accommodate a cooperating lid. Such rimis provided with a substantially vertical rim wall section 46.

' The container 44 is disposed under the burner unit with its rim 45 engaging beneath The annular wall 46 is spaced from but proximate to the lower flared portion of chimney 40, and co"- operates therewith to provide an annular air injector passage. Because ofthe flared construction of the chimney the sectional area of this injector passage decreases toward its lower end, the Wall 46 and the flared chimney wall being juxtaposed inmutually converging relation. This construction effects a forcible down draft of incoming air into the container. In the construction'shown, annular opening 41 is in substantial registry with such injector passage. The area of opening 41 is greater than that across the lowermost Container 44 is supported on the bottom plate 15, which may be provided with suitable positioning lugs (not shown) in order accurately to position the container.

In operating the device, the fuel container such as 44 is first placed into position for cooperation with the burner unit. To do this knob 33 is first raised vertically, until lever functions.

.ing downwardly therein to a point somewhat below the lower edge'of rim wall 46. When lair ports 29 and 30 are in registry, an incoming current of air will pass therethrough,

into the chamber formed by shells 24 and 26.

From this chamber it will pass with appreciable velocity through the converging injector passage downwardly into container 44, and will pass under the lower baflle'portion of chimney 40 toward the center of the container, combining with the fuel to effect combustion. The heated products of combustion pass upwardly through chimney 40 toward the burner opening 16, and operate to heat the utensil which is disposed thereover. The chamber formed by shells 24 and 26 preferably is sufiicient-ly large to accommodate the incoming air during an appreciable interval of time, and since this chamber is heated to some extent, by the walls of chimney 40, the incoming air is preheated. This air is drawn downwardly through the passage between walls 42 and 46 with suflicient velocity to circumvent any back-flaring or egress of flame through such passage. The notches or-openin'gs 43 permit passage of the air current beneath the lower portion of the chimney, even when the level of the fuel in the container is so high as closely to approach the bottom edge offlthe chimney. .As the fuel level recedes the space between the same and the lower edge of the chimney becomes greater and the' air current can readily pass under the lower edge of the baffie without the aid of notches 43. The rate of combustion can be effectively controlled by lateral manipulation of knob 33, which will cause shell 26 to rotate, and consequently determine the open area of the air inlet ports. Combustionmay be stopped by raising the burner unit and placing a suitable cover over the open end of the fuel container.

It will be seen that there has been provided a structure which is adapted conveniently and efficiently to utilize a number of separately vendable fuel containers, and which is admirably sulted to perform 1ts' intended While the improved burner has been described as cooperating with aspecifically described stove body structure, it is clear that such burner may be used with any suitable stove body, or may be used separately. Also, it is manifest that-the stove body may accommodate a single burner, or a plurality of 1 burners, as desired- Since certain changes may be made in the above construction and different embodiments of the invention could be made without departing from the scope thereof, it is intended that all matter contained in the above description or shown in the accompanying drawing shall be interpreted as illustrative and not in a limiting sense.

It is also to be understood that the following claims are intended to cover all of the generic and specific features of the invention herein described, and all statements of the scope of the invention which, as a matter of language, might be said to fall therebetween.

Having described my invention, what I claim as new and desire to secure by Letters Patent, is

1. A burner assembly comprising, in combination, a housing having air inlet and outlet ports, means for adjusting the area of one of said ports, a sit on said housing, a fuel container having its upper rim detachably disposed in substantially air tight relationship with said seat, and bafile fixed to said housing and disposed between said inlet and outlet and extending partially into said container, whereby incoming air is passed downwardly into said container and around said battle.

2. A burner unit adapted to cooperate with a plurality of interchangeable fuel containers, comprising, in combination, a housing, a seat on said housing adapted to cooperate with the rim of a fuel container, a chimney having its lower end extending into said housing and having its upper end projecting above the same, air ports in said housing, and means for adjusting the area of such ports.

3. A burner unit adapted to cooperate with a plurality of interchangeable fuel containers, comprising in combination, an open bottomed housing having top and a side wall with a series of air ports therein, a horizontally disposed seat at the lower edge of said side wall, and an open ended tube extending through said top and closing the same, the lower end of said tube extending a substantial distance into said housing.

1. A burner unit adapted to cooperate with a plurality of interchangeable fuel containers, comprisin in combination, an open bottomed housing having a top and a cylindrical side wall with a series of air ports therein,

a horizontally disposed annular seat at the lower edge of said side wall, an open ended tube extending through said top and closing the same, the lower end of said ube extending a substantial distance into said housing, and an annular slide valve for adjustably closing said ports.

5. A burner unit comprising, in combina tion, an open bottomed housing having an air inlet and an outlet therein, a chimney inserted through said outlet having its lower portion extending through and slightly beyond said housing, said chimney having an air opening pierced therethrough adjacent its lower extremity.

. 6. A burner assembly comprising in com bination, a housing having an air inlet, and a fuel containing chamber, said housing and chamber being formed with a downwardly conver ing air injectorpassage therebetween, said assembly having an outlet communicating with said chamber. 7 V

7. A burner assembly comprising, in .combination, a housing having an air inlet, a fuel containing chamber, abalile extending from said housing toward said chamber, and cooperating spaced wall proximate to said baffie, said baffle and said wall mutually converging to form therebetween an air injector passage from said housing to said chamber, said assembly having an outlet communicating with said chamber.

8. A burner assembly comprising, in combination, a housing having an air inlet and an outlet, a seat on said housing adapted interchangeably to rest above a plurality of fuel containers, a fuel container having its upper rim detachably disposed in substantially air tight relation with said seat, a baffie disposed in said housing between said inlet and outlet and extending into said container, and a wall on said container spaced from said battle and mutually converging therewith to form an air injector.

9. A burner unit adapted to cooperate with a plurality of interchangeable fuel containers, comprising, in combination, an open bottomed housing formed with relatively movable inner and outer shells having air ports adapted to be moved into and out of registry, a seat on the lower portion of one of said shells adapted to cooperate with the rim of a fuel container, and a chimney fixed to the other of said shells and having its lower portion extendingdownwardly into said last named shell toward said seat.

10. A burner unit adapted to cooperate with a plurality of interchangeable fuel containers, comprising, in combination, a stove body, a support hingedly mounted on said body, an open bottomed housing mounted on on said support and formed with a non-rotatable and a rotatable shell, said shells havin" air inlet ports therein adapted to be moved into and out of registry, a seat on the lower portion of said-fixed shell adapted to cooperate with the rim of a fuel container, said housing also'having an outlet, a lever pivotably secured to said support, and a link connecting said lever and said rotatable shell, whereby said lever is adapted relatively to rotate said shells and bodily to move said hinged support.

11. A stove assembly comprising, in combination, a stove body, an open bottomed burner housing having an air inlet and an air tachably disposed in substantially air tight relationship with said seat, said housing being' hinged to said body whereby said seat may be separated from saidcontainer.

12. A stove assembly comprising, in combination, a stove body, a hinged burner unit a formed with a non-rotatable shell hinged to said body, a rotatable shell slidable with respect to said first named shell, said shells having air ports therein adapted to be moved into and out of registry, said unit being provided with an air outlet, a fuel container adapted tocooperate with said hinged unit when the latter is in one position, and manually operable means associated with said unit for rotating said rotatable shell and for swinging said unit about its hinge.

13. A stove assembly comprising, in combination, a stove body, a hinged burner unit formed with a non-rotatable shell hinged to said body, a rotatable shell slidcble with respect to said first named shell, said shells having air ports therein adapted to be moved into and out-of registry, said unit being provided with an air outlet, a fuel container adapted to cooperate with said hinged unit when the latter is in one position, and manually operable means associated with said unit for rotating said rotatable shell and for swinging said unit about its hinge, said stove body being provided with a shoulder adapted to support said means for holding said unit in inoperative position.

14:. A stove assembly, comprising, in combination, a stove body, an open bottomed burner housing hingedly mounted on said stove body and having an air inlet and an air outlet, a fuel container having an open top in communication with the open bottom of said housing in one position of the latter, means for efiecting a substantially air-tight relationship between the upper rim of said container and said housing when the latter is in such last named position, and means for turning said housing on its hinge to separate it from said container.

15. In a burner assembly the combination comprising a fuel container having an opening in its top, a vertical chimney having its lower end extending partially into said container and having its walls spaced inwardly from the edges of said opening, means for supporting said chimney with respect to said container, said chimney having a cut away air opening or notch through its lower wall portion to provide for passageof air therepast when its lower extremity is in engagement with the surface of the, fuel in said container.

16. In a burner assembly, the combination comprising a vertical chimney mounted for cooperation with a plurality of interchangeable fuel containers, a fuel' container having an opening in its top, said chimney having its lower portion inserted partially into said container and spaced inwardly from the edges of said opening, a wall-on said container opposite to and spaced outwardly from such inserted chimney portion and mutually downwardly converging therewith to form an air injector passage into the container.

17 In a stove assembly, a stove body, a burner, unit including a vertical chimney hingedly mounted on said body for cooperation with a plurality of interchangeable fuel containers, a fuel container havingan opening in its top, said chimney having its lower wall portion inserted partially into said container when in one position, a wall on said container opposite to and spaced from such inserted chimney portion and mutually downwardly converging therewith to form an air injector passage into thecontainer, and

1 means for tilting said chimney about its hinge to remove it from said container.

18.111 a stove assembly, a stove body, a burner unit comprising a vertical chimney, hingedly mounted on said body for cooperation with a plurality of interchangeable fuel containers, a fuel container having an opening'in its top, said chimney having its lower wall portion inserted partially into said container and spaced inwardly from the edges of said opening when in one position, to provide a passage for incoming air, and a handle for tilting said chimney about its hinge to remove it from said container.

In testimony whereof I afiix my signature.

ARTHUR SMITH. 

